A blowout-preventing device for a full-face high-pressure jet grouting pile

Abstract

The application discloses a kind of all-around high-pressure jetting construction method pile drilling blowout prevention devices, including chassis, and the chassis is equipped with blowout prevention assembly, and the chassis is equipped with butt joint assembly between blowout prevention assembly;Butt joint assembly includes support frame, and the support frame is equipped with support ring, and the top of support ring is fixedly installed with multiple annular distribution's convex rod;Convex rod is equipped with same support frame on outer wall, and the center of support frame bottom is fixedly installed with laser lamp, and the center of laser lamp is on same axis with the center of annular structure formed by multiple convex rod;Blowout prevention assembly includes main pipe, and the bottom end of main pipe is sealedly connected with butt joint assembly by sealing sheet, and the top end of main pipe is sequentially flange-connected with adapter pipe a, adapter pipe b, and the inner wall of adapter pipe b is installed with multiple soft rubber waterstop sheets for sealing the outer wall of drill rod.The application is installed by split type laser alignment, improves the accuracy of installation alignment;Combined with modular sealing, the blowout prevention efficiency and reliability of all-around high-pressure jetting construction method pile drilling are improved.

Description

Technical Field

[0001] This invention belongs to the field of anti-gushing technology and relates to an all-round high-pressure jetting pile drilling anti-gushing device. Background Technology

[0002] The all-around high-pressure jet grouting method for pile foundations, based on traditional high-pressure jet grouting technology, employs a unique multi-hole pipe and front-end forming device to achieve forced grout discharge within the borehole and monitoring of ground pressure. By adjusting the forced grout discharge volume, the ground pressure is controlled, ensuring reasonable control of deep mud removal and ground pressure, and guaranteeing stable ground pressure. When drilling or jet grouting in confined aquifers, sand inrush or grout leakage at the borehole opening frequently occurs, endangering construction safety.

[0003] When installing a blowout preventer, the center of the device must be aligned with the center of the borehole to ensure they are on the same axis. However, existing blowout preventers are generally one-piece structures. Since the overall structure is relatively large, alignment is difficult during installation, which increases the difficulty for workers to install the device.

[0004] Therefore, it is necessary to provide a new all-round high-pressure jetting pile drilling anti-jet device to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides an all-around high-pressure jet grouting pile drilling anti-gushing device. Through a split-type laser alignment installation, the accuracy of installation alignment is improved; combined with modular sealing, it enhances the anti-gushing efficiency and reliability of all-around high-pressure jet grouting pile drilling.

[0006] The technical solution adopted in this invention is an all-round high-pressure jetting pile drilling anti-blowout device, including a chassis, an anti-blowout component on the chassis, and a docking component for installing and positioning the anti-blowout component between the chassis and the anti-blowout component.

[0007] The docking assembly includes a support frame, which is fixedly mounted on the chassis. The support frame is provided with a support ring, which can move laterally or longitudinally in the horizontal plane. Multiple annularly distributed protruding rods are fixedly mounted on the top of the support ring. The same support frame is sleeved on the outer wall of the multiple protruding rods. A laser light is fixedly mounted at the center of the bottom of the support frame. The center of the laser light and the center of the annular structure formed by the multiple protruding rods are on the same axis.

[0008] The blowout preventer includes a main pipe, the bottom of which is sealed to the docking assembly via a sealing plate, and the top of which is sequentially connected to the flanges of the transfer pipe a and transfer pipe b. The inner wall of the transfer pipe b is equipped with multiple soft rubber waterstops to seal the outer wall of the drill pipe.

[0009] Furthermore, the top of the transfer pipe b is provided with a guide assembly, which includes a mounting seat. The mounting seat is connected to the flange at the top of the transfer pipe b. A rotatably connected mounting cylinder is installed on the top of the mounting seat. Two sets of staggered transverse guide rollers and longitudinal guide rollers are mounted on the inner wall of the mounting cylinder. The transverse guide rollers and longitudinal guide rollers abut against the outer wall of the drill pipe to guide the drill pipe.

[0010] Furthermore, each set of transverse guide rollers and longitudinal guide rollers consists of four rollers, symmetrically distributed inside the mounting cylinder. The longitudinal guide rollers are located between the transverse guide rollers, and the transverse guide rollers and longitudinal guide rollers are staggered in the axial direction. The ends of the transverse guide rollers and longitudinal guide rollers are rotatably connected to the inner wall of the mounting cylinder.

[0011] Furthermore, a fixedly connected support cylinder is installed on the chassis. A through hole is opened in the center of the chassis. The diameter of the through hole is smaller than the diameter of the end of the connecting pipe. The distance from the top of the chassis to the top of the support cylinder is the same as the distance from the bottom of the sealing plate to the bottom of the connecting pipe. The top of the chassis abuts against the bottom of the connecting pipe, and the top of the support cylinder abuts against the top of the sealing plate.

[0012] Furthermore, the support frame has a through hole at the position corresponding to the protruding rod, and the inner wall of the through hole abuts against and slides with the outer wall of the protruding rod; the sealing plate has a plurality of annularly distributed mating holes at the position corresponding to the protruding rod, and the inner wall of the mating hole abuts against and slides with the outer wall of the protruding rod; the center of the sealing plate has a connecting pipe for connecting with the blowout preventer assembly.

[0013] Furthermore, the inner bottom of the adapter pipe b is provided with an annular mounting groove, and the inner wall of the adapter pipe b is provided with multiple annularly distributed slots. The mounting groove, slots and positioning grooves are interconnected. Multiple support rings are inserted inside the adapter pipe b. The lowest support ring is placed in the mounting groove. The outer wall of the support ring is provided with multiple fixedly connected and annularly distributed inserts. The inserts extend into the slots and are slidably connected. The inner wall of the support ring is fixedly connected to the outer wall of the soft rubber waterstop.

[0014] Furthermore, the inner top of the adapter pipe b is provided with an annular positioning groove, the positioning ring is installed in the positioning groove, and multiple annularly distributed positioning blocks are fixedly installed at the bottom of the positioning ring. The bottom end of the positioning block abuts against the top of the uppermost support ring, and the positioning block extends into the slot and slides in connection.

[0015] Furthermore, a connecting ring is fixedly connected to the top of the positioning ring, and the connecting ring is fixedly connected to the adapter pipe b and the mounting base by bolts.

[0016] Furthermore, a slurry discharge valve and a slurry replenishment valve are fixedly installed on the main pipe, a pressure gauge is installed on the side wall of the main pipe near the slurry discharge valve, and a gate valve is installed on the transfer pipe a.

[0017] Furthermore, two sets of symmetrically distributed support blocks a are fixedly installed on the top of the support frame. A rotatably connected lead screw a is mounted between each set of support blocks a. A threaded movable block a is fitted onto the outer wall of each lead screw a. The top ends of multiple movable blocks a are fixedly connected to the bottom of the adapter plate. Two sets of symmetrically distributed support blocks b are fixedly installed on the top of the adapter plate. A rotatably connected lead screw b is mounted between each set of support blocks b. A threaded movable block b is fitted onto the outer wall of each lead screw b. The top ends of multiple movable blocks b are fixedly connected to the bottom of the support ring. Motors that drive the lead screw a and lead screw b are fixedly installed on the outer walls of the support blocks a and b, respectively.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention uses a ring-shaped reference surface formed by a protruding rod, which is coaxial with the laser lamp, to quickly align the main shaft axis with the drilling mark point, solving the problem of low efficiency in manual alignment of large equipment. The support ring can drive the protruding rod to move laterally or longitudinally in the horizontal plane, realizing split-type dynamic calibration and improving the accuracy of installation alignment.

[0020] 2. In the guiding assembly of the present invention, the transverse guide roller and the longitudinal guide roller abut against the outer wall of the drill rod to guide the drill rod into the borehole; at the same time, since the drill rod moves in a spiral motion, during this process, the action of the drill rod abutting against the transverse guide roller and the longitudinal guide roller causes them to rotate, thereby reducing the frictional force on the drill rod during the guiding process and avoiding jamming.

[0021] 3. The soft rubber waterstop of this invention can be independently disassembled and installed via the support ring. In case of damage, it is not necessary to disassemble the entire blowout preventer assembly, shortening maintenance time and reducing the difficulty of subsequent inspection and maintenance for personnel. The sliding fit between the insert and the slot enables quick positioning of the support ring; the positioning block inserts into the slot to press the uppermost support ring, reducing the impact of drill rod vibration on the sealing effect. The mating hole of the sealing sheet fits tightly with the protruding rod, the connecting pipe is pressed and sealed with the chassis, and it also seals with the top surface of the support cylinder, providing triple sealing protection to prevent high-pressure slurry leakage. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a preferred embodiment of the anti-gushing device for drilling piles using the all-round high-pressure jetting method provided by the present invention.

[0024] Figure 2 for Figure 1 The diagram shows a partial cross-sectional structure of the chassis and docking assembly connection.

[0025] Figure 3 for Figure 2 The diagram shows the structure of the support frame and its components.

[0026] Figure 4 for Figure 1 The diagram shows the structure of the sealing sheet and its components.

[0027] Figure 5 for Figure 2 The diagram shown is a top-down view of the support frame.

[0028] Figure 6 for Figure 1 The diagram shows the structure of the guide component.

[0029] Figure 7 for Figure 1 The diagram shows the structure of the main unit and its components.

[0030] Figure 8 for Figure 1 The diagram shows a partial cross-sectional view of the adapter pipe b and its components.

[0031] Figure 9 for Figure 8 The diagram shows a cross-sectional view of the transfer pipe b.

[0032] Figure 10 for Figure 8 The diagram shows the structure of the connecting ring and its components.

[0033] Numbered components in the diagram: 1. Chassis; 11. Support cylinder; 12. Through hole; 2. Blowout preventer assembly; 21. Main pipe; 211. Slurry discharge valve; 212. Slurry replenishment valve; 213. Pressure gauge; 22. Transfer pipe a; 221. Gate valve; 23. Transfer pipe b; 231. Mounting groove; 232. Slot; 233. Positioning groove; 24. Connecting ring; 241. Positioning ring; 242. Positioning insert; 25. Support ring; 251. Insert strip; 252. Soft rubber waterstop; 3. Connecting assembly; 31 311. Support frame; 312. Screw a; 313. Moving block a; 314. Adapter plate; 315. Support block b; 316. Screw b; 317. Moving block b; 32. Sealing plate; 321. Connecting pipe; 322. Connecting hole; 33. Support ring; 331. Protruding rod; 34. Support frame; 341. Through hole; 342. Laser light; 4. Guide assembly; 41. Mounting base; 42. Mounting cylinder; 421. Transverse guide roller; 422. Longitudinal guide roller. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides an all-around high-pressure jet grouting pile drilling anti-blowout device, such as... Figure 1 As shown, it includes a chassis 1 and a blowout preventer 2 for preventing blowouts during drilling. The chassis 1 is provided with a docking component 3 for installing and positioning the blowout preventer 2.

[0036] like Figures 2-5 As shown, the docking assembly 3 includes a support frame 31, which is fixedly mounted on the chassis 1. The support frame 31 is provided with a support ring 33, which can move laterally or longitudinally in the horizontal plane. Multiple annularly distributed protrusions 331 are fixedly mounted on the top of the support ring 33. The same support frame 34 is movably sleeved on the outer wall of the multiple protrusions 331. A laser lamp 342 is fixedly mounted at the center of the bottom of the support frame 34, and the center of the laser lamp 342 is on the same axis as the center of the annular structure formed by the multiple protrusions 331. The top of the support ring 33 is sealed to the blowout preventer assembly 2 through a sealing plate 32.

[0037] like Figure 4 As shown, the sealing plate 32 has multiple annularly distributed mating holes 322 at positions corresponding to the protrusion 331. The inner wall of the mating hole 322 abuts against and slides against the outer wall of the protrusion 331. The center of the sealing plate 32 has a connecting pipe 321 for connection with the blowout preventer assembly 2. The sealing plate 32 includes a metal substrate, and a rubber sleeve is fitted over the metal substrate. When the sealing plate 32 abuts against the top of the support cylinder 11, the deformation of the rubber sleeve improves the sealing effect of the sealing plate 32.

[0038] like Figure 5 As shown, a through hole 341 is provided on the support frame 34 at the position corresponding to the protruding rod 331. The inner wall of the through hole 341 abuts against and slides with the outer wall of the protruding rod 331. The diameter of the through hole 341 is 0.1-0.3mm larger than that of the protruding rod 331. The inner wall is plated with hard chrome to ensure that the laser lamp 342 is always aligned with the center of the ring.

[0039] It should be noted that, through the setting of the docking component 3, during the installation of this device, the chassis 1 can be installed in the marked area first, and then the support ring 33 can be controlled to move horizontally or vertically as needed. During this process, the top protruding rod 331 can be adjusted horizontally. During the adjustment of the protruding rod 331, the position of the laser beam irradiated by the laser lamp 342 at the center of the outer support frame 34 of the protruding rod 331 can be compared with the position of the marked point until the position of the laser beam coincides with the center of the marked point. This completes the position adjustment of the protruding rod 331. After the docking hole 322 of the sealing plate 32 is connected to the protruding rod 331, the axis of the main pipe 21 connected to the docking pipe 321 is on the same axis as the marked point. Through the installation of the split laser alignment, the accuracy and portability of the device installation alignment can be improved, and the impact of installation deviations on the drill rod and the later operation of the device can be reduced. The laser lamp 342 is powered by a built-in battery or an external power plug. The specific circuit settings are known in the art.

[0040] like Figure 3 As shown, a transition plate 314 is provided between the support ring 33 and the support frame 31. The support ring 33 and the transition plate 314 are horizontally arranged. The support ring 33 achieves longitudinal movement through the threaded engagement of the moving block b317 and the lead screw b316, and achieves lateral movement through the threaded engagement of the transition plate 314 and the moving block a313 and the lead screw a312. Two sets of symmetrically distributed support blocks a311 are fixedly installed on the top of the support frame 31. A rotatably connected lead screw a312 is mounted between each support block a311 in the same set. The two lead screws a312 are parallel. Two movable blocks a313 are threadedly connected to the outer walls of the two lead screws a312 respectively. The tops of the multiple movable blocks a313 are fixedly connected to the bottom of the adapter plate 314. Two sets of symmetrically distributed support blocks b315 are fixedly installed on the top of the adapter plate 314. A rotatably connected lead screw b316 is mounted between each support block b315 in the same set. The two lead screws b316 are parallel and perpendicular to the lead screw a312. Two movable blocks b317 are threadedly connected to the outer walls of the two lead screws b316 respectively. The tops of the multiple movable blocks b317 are fixedly connected to the bottom of the support ring 33. Motors that drive the lead screws a312 and b316 are fixedly installed on the outer walls of the support blocks a311 and b315 respectively.

[0041] It should be noted that the motors driving the two lead screws a312 rotate at the same speed, and the motors driving the two lead screws b316 rotate at the same speed. During use, when the motors are working, they drive the corresponding lead screw a312 or lead screw b316 to rotate, which in turn drives the moving block a313 or moving block b317 to move through the threaded structure. During this process, the moving block a313 drives the top protruding rod 331 and other components to move laterally through the adapter plate 314, while the moving block b317 drives the top protruding rod 331 and other components to move longitudinally through the support ring 33. This allows for stepless horizontal adjustment of the protruding rod 331 and the support frame 34 mounted above it. Therefore, the laser beam emitted by the internal laser lamp 342 can be smoothly aligned with the marking point. The motors driving the lead screws a312 and b316 are self-locking motors to prevent the lead screws a312 or b316 from rotating arbitrarily during use. The lead screw mechanism drives the adapter plate 314 and the support ring 33 to move, achieving stepless adjustment in the horizontal plane and improving calibration accuracy. In practical use, a lead screw protective sleeve can be fitted over the lead screw a312 or lead screw b316.

[0042] like Figure 1 , Figures 8-10 As shown, the blowout preventer assembly 2 includes a main pipe 21. A fixedly connected adapter pipe a22 is mounted to the end of the main pipe 21 via a flange and bolts. A fixedly connected adapter pipe b23 is mounted to the end of the adapter pipe a22 via a flange and bolts. Multiple soft rubber waterstops 252 for sealing the outer wall of the drill pipe are inserted into the inner wall of the adapter pipe b23. An annular mounting groove 231 is formed at the bottom inner side of the adapter pipe b23. Multiple annularly distributed slots 232 are formed on the inner wall of the adapter pipe b23. An annular positioning groove 233 is formed at the top inner side of the adapter pipe b23. The mounting groove 231, slots 232, and positioning groove 233 are interconnected. Multiple fixedly connected and annularly distributed inserts 251 are provided on the outer wall of the support ring 25. The inserts 251 extend into the slots 232 and are slidably connected. The lowest support ring 25 is placed in the mounting groove 231. The inner wall of the support ring 25 is fixedly connected to the outer wall of the soft rubber waterstop 252. The positioning ring 241 is installed in the positioning groove 233. Multiple ring-shaped positioning blocks 242 are fixedly installed at the bottom of the positioning ring 241. The positioning blocks 242 extend into the groove 232 and slide. The bottom end of the positioning blocks 242 abuts against the top of the uppermost support ring 25. A connecting ring 24 is fixedly connected to the top of the positioning ring 241. The connecting ring 24 is fixedly connected to the adapter b23 and the mounting base 41 by bolts.

[0043] It should be noted that: Through the installation of the support ring 25, if the soft rubber waterstop 252 used to seal the drill rod is damaged during subsequent use, the drill rod and guide assembly 4 located on the outer side can be removed first. After disconnecting the guide assembly 4, the connecting ring 24 can be lifted upwards. During this process, the connecting ring 24 can drive the positioning ring 241 and the positioning block 242 to move synchronously, thereby releasing the positioning block 242 from obstructing and limiting the top of the support ring 25. Then, multiple support rings 25 can be removed sequentially from the mounting groove 231, thus disassembling the soft rubber waterstop 252. After the damaged soft rubber waterstop 252 is removed... After disassembling part 2, a brand new soft rubber waterstop 252 can be taken out and inserted into the mounting groove 231 and slot 232 in sequence through the support ring 25 and the insert 251 on its outer wall. After the soft rubber waterstop 252 is replaced and inserted, the positioning ring 241 and the positioning insert 242 are inserted into the positioning groove 233 and slot 232 in sequence, so that the bottom end of the positioning insert 242 abuts against the top of the uppermost support ring 25. Then, the flange on the mounting seat 41 in the guide assembly 4 can be fixed to the flange at the top of the connecting ring 24 and the adapter pipe b23 with bolts. Therefore, it is more convenient for the staff to replace the soft rubber waterstop 252 in the future.

[0044] like Figure 1 and Figure 6 As shown, the top of the adapter pipe b23 is provided with a guide assembly 4. The guide assembly 4 includes a mounting base 41, which is fixedly connected to the flange at the top of the adapter pipe b23 by bolts. A rotatably connected mounting cylinder 42 is mounted on the top of the mounting base 41. Two sets of staggered transverse guide rollers 421 and longitudinal guide rollers 422 are mounted on the inner wall of the mounting cylinder 42. Each set of transverse guide rollers 421 and longitudinal guide rollers 422 consists of four rollers and is symmetrically distributed inside the mounting cylinder 42 to distribute the force evenly. The longitudinal guide rollers 422 are located between the transverse guide rollers 421. The transverse guide rollers 421 and longitudinal guide rollers 422 are staggered in the axial direction. The ends of the transverse guide rollers 421 and longitudinal guide rollers 422 are rotatably connected to the inner wall of the mounting cylinder 42 to constrain the drill pipe offset.

[0045] It should be noted that with the addition of the guide assembly 4, during subsequent use, the transverse guide roller 421 and the longitudinal guide roller 422 in the guide assembly 4 will guide the drill rod to insert into the borehole by abutting against the outer wall of the drill rod. At the same time, since the drill rod moves in a spiral motion, the downward force of the spiral moving drill rod will be abutted against the transverse guide roller 421 and the longitudinal guide roller 422, causing it to rotate. The force of the drill rod rotation can also drive the mounting cylinder 42 to rotate on the mounting base 41 through the frictional force abutting against the transverse guide roller 421 and the longitudinal guide roller 422. This can reduce the friction generated during the guidance of the drill rod, thus making the movement of the drill rod smoother.

[0046] like Figures 1-2 As shown, a support cylinder 11 is fixedly connected to the chassis 1. The support cylinder 11 is a rigid cylindrical structure. A through hole 12 is opened in the center of the chassis 1. The diameter of the through hole 12 is smaller than the diameter of the end of the connecting pipe 321. The distance from the top of the chassis 1 to the top of the support cylinder 11 is the same as the distance from the bottom of the sealing plate 32 to the bottom of the connecting pipe 321. The top of the chassis 1 abuts against the bottom of the connecting pipe 321, and the top of the support cylinder 11 abuts against the top of the sealing plate 32.

[0047] It should be noted that: because the diameter of the through hole 12 is smaller than the diameter of the end of the connecting pipe 321, during the installation of the connecting pipe 321, after the worker initially fixes the base plate 1 at the marked point, there is a slight deviation between its internal center and the marked point. By comparing with the laser lamp 342, the positions of multiple protruding rods 331 are adjusted. After the sealing plate 32 is sleeved on the outside of the protruding rod 331, the bottom end of the larger diameter connecting pipe 321 abuts against the base plate 1, sealing the outside of the through hole 12 in the base plate 1. This reduces the impact of slurry seeping from the through hole 12 into the outside of the lead screw a312 and lead screw b316 of the support cylinder 11 during drilling, thus affecting its subsequent rotation.

[0048] In this embodiment: since the distance from the top of the chassis 1 to the top of the support cylinder 11 is the same as the distance from the bottom of the sealing plate 32 to the bottom of the connecting pipe 321, after the sealing plate 32 is fitted onto the outer wall of the protrusion 331, when the bottom of the connecting pipe 321 abuts against the chassis 1, the bottom of the sealing plate 32 also abuts against the top of the support cylinder 11, thereby achieving a seal on the end of the support cylinder 11. At the same time, the friction between the bottom of the sealing plate 32 and the top of the support cylinder 11 can also increase the stability of the protrusion 331 in supporting the blowout preventer 2.

[0049] like Figure 7 As shown, a slurry discharge valve 211 and a slurry replenishment valve 212 are fixedly installed on the main pipe 21 and communicate with its interior. A pressure gauge 213 is fixedly connected to the side wall of the main pipe 21 near the slurry discharge valve 211, and a gate valve 221 is installed on the transfer pipe a22.

[0050] It should be noted that: by setting pressure gauge 213, pressure gauge 213 can monitor the pressure pile body in the hole in real time during construction. When the pressure increases, the grout discharge valve 211 can be opened to discharge grout and relieve pressure. When it is necessary to maintain the pressure in the ground, grout injection valve 212 can be used to inject grout and increase pressure. In subsequent use, when the drill rod is pulled out of the hole, the gate valve 221 can be flexibly closed to seal and stop water, preventing sudden gushing from the hole.

[0051] The working principle of the all-round high-pressure jetting pile drilling anti-blowout device provided in this embodiment of the invention is as follows:

[0052] When in use, the staff can first remove the base plate 1 from the device, and then fix it to the required marking point location with bolts;

[0053] Next, the support frame 34 is taken out and, through the through hole 341 inside, is fitted onto the outer wall of the multiple protruding rods 331 on the top of the support ring 33. At this time, the laser lamp 342 at the bottom center of the support frame 34 will be on the same axis as the center of the ring structure formed by the multiple protruding rods 331. After the laser lamp 342 is installed, the motors used to drive the lead screws a312 and b316 can be controlled to rotate as needed. The rotating lead screws a312 and b316 will drive the moving blocks a313 and b317 on the outer wall to move through the threaded structure. Thus, the protruding rods 331 and the support frame 34 and laser lamp 342 on their outer walls can be moved synchronously through the support ring 33 until the light emitted by the laser lamp 342 coincides with the center of the marking point. This completes the adjustment and positioning of the multiple protruding rods 331.

[0054] Then, the support frame 34 is removed from the outer wall of the protruding rod 331, and the sealing plate 32 in the docking assembly 3 is fitted onto the outer wall of the protruding rod 331 through the docking hole 322 until the bottom of the sealing plate 32 abuts against the top of the support cylinder 11 and the bottom end of the docking pipe 321 abuts against the outer wall of the through hole 12 inside the chassis 1. Then the sealing plate 32 is fixed.

[0055] After the sealing plate 32 is installed and fixed, the flange at the end of the main pipe 21 and the flange at the end of the connecting pipe 321 in the blowout preventer assembly 2 are fixed with bolts. This allows the installation of the blowout preventer assembly 2 and its end guide assembly 4, so that the axis of each pipe in the blowout preventer assembly 2 is on the same axis as the center of the marking point, thus enabling accurate installation of the device.

[0056] After the installation of the device is completed, the drilling equipment, including the main unit, high-pressure pump, air compressor, mud mixing system, and all-around high-pressure jet management device, can be checked to ensure its normal operation. After ensuring the equipment is in normal working order, the drill rod can be inserted into the device for drilling operations. During the drilling operation, the transverse guide roller 421 and longitudinal guide roller 422 of the guide assembly 4 guide the movement trajectory of the drill rod by abutting against the outer wall of the drill rod, making the insertion and movement of the drill rod more stable. During the spiral movement of the drill rod, the friction between the drill rod and the transverse guide roller 421 and longitudinal guide roller 422 will drive the transverse guide roller 421 and longitudinal guide roller 422 and the mounting cylinder 42 on their outer wall to rotate, thereby reducing the friction of the guide assembly 4 in guiding the drill rod and making the drilling operation smoother. During the drilling process, the soft rubber waterstop 252 in the blowout preventer 2 tightly wraps around the outside of the drill rod by abutting against the outer wall of the drill rod to seal and stop water.

[0057] Pressure gauge 213 can monitor the pressure inside the hole in real time during construction. The grout discharge valve 211 can discharge grout and relieve pressure when the pressure at the hole opening increases. The grout replenishment valve 212 can be used to replenish grout into the hole during the pilot hole and shotcreting process to maintain the ground pressure. It can also be used for secondary grouting after shotcreting to fill the voids formed after the cement grout in the hole solidifies. When the drill rod is pulled out of the hole opening, the gate valve 221 can be flexibly closed to seal and stop water flow to prevent sudden gushing at the hole opening.

[0058] During subsequent use, when the soft rubber waterstop 252 used to seal the outer wall of the drill pipe in the blowout preventer assembly 2 is damaged due to friction, the operator removes the drill pipe located on the outside, then loosens the bolts connecting the mounting base 41 and the adapter pipe b23, separating the guide assembly 4 from the blowout preventer assembly 2. After the mounting base 41 in the guide assembly 4 is disassembled, the limiting position of the positioning ring 241 can be released. At this time, the operator can first remove the positioning ring 241 from the adapter pipe b23, thereby releasing the limiting position of the internal support ring 25. Then, the operator can sequentially remove the support ring 25 from the inside of the adapter pipe b23 to complete the disassembly of the soft rubber waterstop 252. This split structure design reduces the difficulty of disassembling the soft rubber waterstop 252, making subsequent maintenance work more convenient and thus improving the user experience of the device.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A comprehensive high-pressure jet grouting pile drilling anti-gushing device, comprising a chassis (1), characterized in that, A blowout preventer (2) is provided on the chassis (1), and a docking component (3) for installing and positioning the blowout preventer (2) is provided between the chassis (1) and the blowout preventer (2). The docking assembly (3) includes a support frame (31), which is fixedly installed on the chassis (1). The support frame (31) is provided with a support ring (33), which can move laterally or longitudinally in the horizontal plane. Multiple annularly distributed protruding rods (331) are fixedly installed on the top of the support ring (33). The same support frame (34) is sleeved on the outer wall of the multiple protruding rods (331). A laser lamp (342) is fixedly installed at the center of the bottom of the support frame (34). The center of the laser lamp (342) and the center of the annular structure formed by the multiple protruding rods (331) are on the same axis. The blowout preventer (2) includes a main pipe (21), the bottom end of which is sealed to the docking assembly (3) via a sealing plate (32), and the top end of the main pipe (21) is sequentially connected to the flanges of the transfer pipe a (22) and the transfer pipe b (23). The inner wall of the transfer pipe b (23) is equipped with multiple soft rubber waterstops (252) to seal the outer wall of the drill pipe. The inner bottom of the adapter pipe b (23) is provided with an annular mounting groove (231), and the inner wall of the adapter pipe b (23) is provided with multiple annularly distributed slots (232). The mounting groove (231), slots (232) and positioning groove (233) are interconnected. Multiple support rings (25) are inserted inside the adapter pipe b (23). The lowest support ring (25) is placed in the mounting groove (231). The outer wall of the support ring (25) is provided with multiple fixedly connected and annularly distributed inserts (251). The inserts (251) extend into the slots (232) and slide. The inner wall of the support ring (25) is fixedly connected to the outer wall of the soft rubber waterstop (252).

2. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 1, characterized in that, The top of the transfer pipe b (23) is provided with a guide assembly (4), which includes a mounting base (41). The mounting base (41) is connected to the flange at the top of the transfer pipe b (23). The top of the mounting base (41) is equipped with a rotating mounting cylinder (42). The inner wall of the mounting cylinder (42) is provided with two sets of staggered transverse guide rollers (421) and longitudinal guide rollers (422). The transverse guide rollers (421) and longitudinal guide rollers (422) abut against the outer wall of the drill pipe to guide the drill pipe.

3. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 2, characterized in that, Each set of transverse guide rollers (421) and longitudinal guide rollers (422) consists of four rollers, which are symmetrically distributed inside the mounting cylinder (42). The longitudinal guide rollers (422) are located between the transverse guide rollers (421). The transverse guide rollers (421) and the longitudinal guide rollers (422) are staggered in the axial direction. The ends of the transverse guide rollers (421) and the longitudinal guide rollers (422) are rotatably connected to the inner wall of the mounting cylinder (42).

4. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 1, characterized in that, A fixedly connected support cylinder (11) is installed on the chassis (1). A through hole (12) is opened in the center of the chassis (1). The diameter of the through hole (12) is smaller than the diameter of the end of the connecting pipe (321). The distance from the top of the chassis (1) to the top of the support cylinder (11) is the same as the distance from the bottom of the sealing plate (32) to the bottom of the connecting pipe (321). The top of the chassis (1) abuts against the bottom of the connecting pipe (321), and the top of the support cylinder (11) abuts against the top of the sealing plate (32).

5. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 1, characterized in that, The support frame (34) has a through hole (341) at the position corresponding to the protrusion (331). The inner wall of the through hole (341) abuts against and slides with the outer wall of the protrusion (331). The sealing plate (32) has a plurality of annularly distributed docking holes (322) at the position corresponding to the protrusion (331). The inner wall of the docking hole (322) abuts against and slides with the outer wall of the protrusion (331). The center of the sealing plate (32) is provided with a connecting pipe (321) that connects to the blowout preventer assembly (2).

6. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 1, characterized in that, The inner top of the adapter pipe b (23) is provided with an annular positioning groove (233). The positioning ring (241) is installed in the positioning groove (233). Multiple annularly distributed positioning blocks (242) are fixedly installed at the bottom of the positioning ring (241). The bottom end of the positioning block (242) abuts against the top of the uppermost support ring (25). The positioning block (242) extends into the slot (232) and slides.

7. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 6, characterized in that, The top of the positioning ring (241) is fitted with a fixed connecting ring (24), which is fixedly connected to the adapter pipe b (23) and the mounting base (41) by bolts.

8. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 1, characterized in that, The main pipe (21) is fixedly installed with a slurry discharge valve (211) and a slurry replenishment valve (212). A pressure gauge (213) is installed on the side wall of the main pipe (21) near the slurry discharge valve (211). A gate valve (221) is installed on the transfer pipe a (22).

9. The all-around high-pressure jet grouting pile drilling anti-blowout device according to claim 1, characterized in that, The top of the support frame (31) is fixedly equipped with two sets of symmetrically distributed support blocks a (311). A rotatably connected lead screw a (312) is mounted between each set of support blocks a (311). A threaded movable block a (313) is fitted onto the outer wall of the lead screw a (312). The tops of multiple movable blocks a (313) are fixedly connected to the bottom of the adapter plate (314). The top of the adapter plate (314) is fixedly equipped with two sets of symmetrically distributed support blocks b (311). 315), each of the support blocks b (315) in the same group is provided with a rotatably connected lead screw b (316), and a threaded moving block b (317) is sleeved on the outer wall of the lead screw b (316). The top of each of the multiple moving blocks b (317) is fixedly connected to the bottom of the support ring (33), and motors for driving the lead screw a (312) and lead screw b (316) are fixedly installed on the outer walls of the support block a (311) and support block b (315), respectively.

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